/Engine/Plugins/Runtime/GeoReferencing/Source/GeoReferencing/Public/GeoReferencingSystem.h
Set this transform to an Ellipsoid to have it positioned tangent to the origin.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="GeoReferencing|Misc") FTransform GetPlanetCenterTransform()